fileprivate var chart: Chart? // arc

override func viewDidLoad() {

super.viewDidLoad()

// map model data to chart points

let chartPoints: [ChartPoint] = [(2, 2), (4, 4), (6, 6), (8, 8), (8, 10), (15, 15)].map{ChartPoint(x: ChartAxisValueInt($0.0), y: ChartAxisValueInt($0.1))}

let labelSettings = ChartLabelSettings(font: ExamplesDefaults.labelFont)

let generator = ChartAxisGeneratorMultiplier(2)

let labelsGenerator = ChartAxisLabelsGeneratorFunc {scalar in

return ChartAxisLabel(text: "\(scalar)", settings: labelSettings)

}

let xGenerator = ChartAxisGeneratorMultiplier(2)

let xModel = ChartAxisModel(firstModelValue: 0, lastModelValue: 16, axisTitleLabels: [ChartAxisLabel(text: "Axis title", settings: labelSettings)], axisValuesGenerator: xGenerator, labelsGenerator: labelsGenerator)

let yModel = ChartAxisModel(firstModelValue: 0, lastModelValue: 16, axisTitleLabels: [ChartAxisLabel(text: "Axis title", settings: labelSettings.defaultVertical())], axisValuesGenerator: generator, labelsGenerator: labelsGenerator)

let chartFrame = ExamplesDefaults.chartFrame(view.bounds)

let chartSettings = ExamplesDefaults.chartSettingsWithPanZoom

// generate axes layers and calculate chart inner frame, based on the axis models

let coordsSpace = ChartCoordsSpaceLeftBottomSingleAxis(chartSettings: chartSettings, chartFrame: chartFrame, xModel: xModel, yModel: yModel)

let (xAxisLayer, yAxisLayer, innerFrame) = (coordsSpace.xAxisLayer, coordsSpace.yAxisLayer, coordsSpace.chartInnerFrame)

// create layer with guidelines

let guidelinesLayerSettings = ChartGuideLinesDottedLayerSettings(linesColor: UIColor.black, linesWidth: ExamplesDefaults.guidelinesWidth)

let guidelinesLayer = ChartGuideLinesDottedLayer(xAxisLayer: xAxisLayer, yAxisLayer: yAxisLayer, settings: guidelinesLayerSettings)

// view generator - this is a function that creates a view for each chartpoint

let viewGenerator = {(chartPointModel: ChartPointLayerModel, layer: ChartPointsViewsLayer, chart: Chart) -> UIView? in

let viewSize: CGFloat = Env.iPad ? 30 : 20

let center = chartPointModel.screenLoc

let label = UILabel(frame: CGRect(x: center.x - viewSize / 2, y: center.y - viewSize / 2, width: viewSize, height: viewSize))

label.backgroundColor = UIColor.green

label.textAlignment = NSTextAlignment.center

label.text = chartPointModel.chartPoint.y.description

label.font = ExamplesDefaults.labelFont

return label

}

// create layer that uses viewGenerator to display chartpoints

let chartPointsLayer = ChartPointsViewsLayer(xAxis: xAxisLayer.axis, yAxis: yAxisLayer.axis, chartPoints: chartPoints, viewGenerator: viewGenerator, mode: .translate)

// create chart instance with frame and layers

let chart = Chart(

frame: chartFrame,

innerFrame: innerFrame,

settings: chartSettings,

layers: [

xAxisLayer,

yAxisLayer,

guidelinesLayer,

chartPointsLayer

]

)

view.addSubview(chart.view)

self.chart = chart

}